Systems and methods for providing a combination power supply module containing the main drive electronics and backup drive electronics along with a backup power supply for a light emitting diode (LED) based luminaire are described herein. The power supply module may include a main LED driver that is electrically connected to a main power supply through active power factor correction circuitry and is also electrically connected to an LED or array of LEDs. The power supply module further includes power management circuitry electrically connected to a backup power supply and an emergency LED driver, where the power management circuitry discharges the backup power supply to supply power to the emergency LED driver for powering at least a subset of the LEDs when power is no longer being supplied to the main LED driver. The main LED driver and the emergency LED driver are contained in the same module housing.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A power supply module for a light emitting diode (LED) based luminaire comprising: a main LED driver, wherein the main LED driver is electrically coupled to a main power supply through an active power factor correction circuitry and electrically coupled to an array of LEDs; a power management circuitry electrically coupled to a backup power storage, the active power factor correction circuitry, and an emergency LED driver, wherein the power management circuitry is configured to receive an output of the active power factor correction circuitry to charge and discharge the backup power storage, wherein the power management circuitry discharges the backup power storage to supply power to the emergency LED driver when power is no longer being supplied to the main LED driver, wherein the emergency LED driver powers at least a subset of the array of LEDs using the discharged power from the backup power storage, and wherein the main LED driver and the emergency LED driver are contained in a same module housing.
2. The power supply module of claim 1 , wherein the backup power supply includes at least one super capacitor.
3. The power supply module of claim 1 , wherein the backup power supply includes at least one of nickel metal hydride, nickel cadmium, lithium, iron chloride, or CU+ battery.
4. The power supply module of claim 1 , wherein the backup power supply includes a combination of at least one super capacitor and at least one battery.
5. The power supply module of claim 1 , wherein the active power factor correction circuitry includes a buck, a boost, a buck-boost, a septic, or a flyback switched power supply circuit topology.
6. The power supply module of claim 1 , wherein the number of LEDs in an array of LEDs is one.
7. A method for providing backup power to a light emitting diode (LED) based luminaire comprising: detecting a power outage condition, wherein the power outage condition indicates that a main LED driver is no longer providing power to an array of LEDs that is electrically coupled to the main LED driver, wherein the power outage condition is detected based on an output of an active power factor correction circuitry, and wherein the main LED driver is electrically coupled to a main power supply through the active power factor correction circuitry; responsive to detecting the power outage condition, discharging a backup power supply to power an emergency LED driver; powering at least a subset of the array of LEDs with the emergency LED driver; providing the main LED driver, the backup power supply, and the emergency LED driver in a same module housing.
8. The method of claim 7 , further comprising the step of prior to detecting the power outage condition, charging the backup power supply.
9. The method of claim 7 , wherein charging the backup power supply comprises charging the backup power supply from an unswitched AC main power source.
10. The method of claim 7 , wherein detecting the power outage condition comprises detecting a loss of power to the main LED driver.
11. The method of claim 7 , wherein detecting the power outage condition comprises detecting a failure mode in the main LED driver.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
August 1, 2012
February 23, 2016
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